FirebaseAuth is not Initialized

Discuss
1

I want to add firebase login system in my app. I use Firebase Authentication and Firebase Core for it.
But I Got Error FirebaseAuth is not Initialized
I Add .Json file too and also checked UseJsonFile box.

Here is blocks I use

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image761×652 69.7 KB

Is This Configuration OK?

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image358×673 27.5 KB

Pls Help me to Resolve this issue.

(I Already search over community but not get satisfactory answer)

2

Have you added package name and sha -1 key on Firebase

3

I Already Added Package Name and SHA1 Key But still face this issue

4

I Use this SHA key to Firebase. Is it OK?
Untitled

5

Yes its ok